Easy buddy...
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Step (1)
I choose a number which is x
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Step (2)
Multiplies by 90 :
[tex]90x[/tex]
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Step (3)
Adds up to -23 :
[tex]90x - 23[/tex]
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And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️